Beautify messy HTML with proper indentation or minify it for production. Strips comments when minifying. 100% client-side.
<div class="container"><h1>Hello World</h1><p>This is a paragraph with <strong>bold</strong> and <em>italic</em> text.</p><ul><li>Item 1</li><li>Item 2</li></ul></div>An HTML formatter is a web development tool that restructures messy or minified HTML markup into clean, properly indented code that is easy to read, edit, and debug. When you view source on most production websites, the HTML is compressed into a single line or inconsistently indented, making it nearly impossible to understand the document structure. This tool parses your HTML and rebuilds it with consistent indentation based on nesting depth, correctly handling void elements like img, br, input, and meta that do not have closing tags. In minify mode, the tool does the opposite — it strips all HTML comments, collapses whitespace, and removes unnecessary characters to produce the smallest possible output for production deployment. Smaller HTML files mean faster page loads and better Core Web Vitals scores. The formatter works entirely in your browser with no server upload required. It handles real-world HTML including complex attribute lists, inline styles, script tags, and deeply nested component structures. Whether you are debugging a template, cleaning up generated markup, or optimizing HTML for deployment, this tool handles both directions instantly.
Select Format to beautify your HTML with proper indentation, or Minify to compress it for production. In format mode, pick 2-space or 4-space indentation to match your project style.
Paste raw HTML from your source code, browser DevTools, or template engine output into the input area. The tool processes it instantly and shows the result below.
Click Copy to place the formatted or minified HTML on your clipboard. Use the formatted version for development and the minified version for production deployment.
Pretty-print and validate JSON with 2 / 4 space indentation.
Convert JSON arrays to CSV format. Auto-detects columns, proper escaping, download as .csv.
Convert CSV data to a JSON array of objects. Handles quoted fields and commas.
Minify HTML by stripping comments, collapsing whitespace. Shows size savings.
Beautify CSS with proper indentation or minify it for production. Strips comments.
Minify CSS by stripping comments, collapsing whitespace, removing trailing semicolons.